211031021323 has 4 divisors (see below), whose sum is σ = 211041233320. Its totient is φ = 211020809328.

The previous prime is 211031021297. The next prime is 211031021351. The reversal of 211031021323 is 323120130112.

211031021323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211031021323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211031021323.

It is not an unprimeable number, because it can be changed into a prime (211031021363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5074938 + ... + 5116351.

It is an arithmetic number, because the mean of its divisors is an integer number (52760308330).

Almost surely, 2^211031021323 is an apocalyptic number.

211031021323 is a deficient number, since it is larger than the sum of its proper divisors (10211997).

211031021323 is a wasteful number, since it uses less digits than its factorization.

211031021323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211996.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 211031021323 its reverse (323120130112), we get a palindrome (534151151435).

The spelling of 211031021323 in words is "two hundred eleven billion, thirty-one million, twenty-one thousand, three hundred twenty-three".